Mataranka – water temperature at Roper River
This page provides up-to-date information about the water temperature at Mataranka, located on the Roper River in Northern Territory. Here you can check current conditions, view recent temperature trends, explore typical monthly ranges, and compare today’s reading with historical averages for this date. The page also includes a 7-day water temperature forecast, local weather information, and swimming conditions.
Current Water Temperature
The water temperature in Roper River at Mataranka today is 27°C.
Water Temperature in Roper River at Mataranka: Daily Trends, Historical Records, and Forecast
✅ River temperatures above 25°C feel warm and are well suited to leisurely swimming and floating. Comfort remains high even if air temperatures are slightly cooler, though hot weather can make the water feel less refreshing. In slower-flowing rivers, very warm water may feel stagnant, especially during heatwaves. Weather conditions such as strong sun or high humidity can further influence how pleasant the swim feels.
Water Temperature Over the Last 30 Days
Water temperatures in Mataranka have been gradually cooling over the past month, with a further drop recorded during the last week.
According to our forecast, the water temperature in Mataranka will be 30.1°C in the next 7 days. See the table below for daily data for the upcoming week.
Table of Daily Water Temperature Data
| Date | Current | Average | Forecast |
|---|---|---|---|
| Apr 28 | 28.0°C | 30.7°C | |
| Apr 29 | 28.0°C | 30.7°C | |
| Apr 30 | 28.0°C | 30.7°C | |
| May 1 | 28.0°C | 30.7°C | |
| May 2 | 28.0°C | 30.7°C | |
| May 3 | 26.8°C | 30.7°C | |
| May 4 | 26.8°C | 30.7°C | |
| May 5 | 26.8°C | 30.7°C | |
| May 6 | 26.8°C | 30.7°C | 26.8°C |
| May 7 | 30.7°C | 27.3°C | |
| May 8 | 30.7°C | 27.8°C | |
| May 9 | 30.7°C | 28.2°C | |
| May 10 | 30.7°C | 28.7°C | |
| May 11 | 30.7°C | 29.2°C | |
| May 12 | 30.7°C | 29.7°C | |
| May 13 | 30.7°C | 30.1°C |
* Current - Actual water temperature value
** Average - Average water temperature on this day in recent years
*** Forecast - Our water temperature forecast
Actual river water temperatures may vary by several degrees from the reported values, particularly after heavy rainfall or periods of changing weather. Rainfall, river flow rates, and runoff from cooler upstream areas can significantly affect water temperature, especially in flowing sections and shaded stretches. Air temperature and cloud cover also play an important role, with warm, sunny conditions helping rivers warm up more quickly. As a result, noticeable temperature differences can occur along the same river.
Our forecast is based on a proprietary mathematical model that takes into account real-time river temperature changes, historical data, seasonal patterns, river flow conditions, recent rainfall, and local air temperature. We also factor in broader weather conditions specific to each region of Australia to improve accuracy.
Monthly Water Temperature Range (Min, Max & Average)
| Month | Today | Yesterday | A Week Ago |
|---|---|---|---|
| January | 30°C | 32°C | 33°C |
| February | 29°C | 32°C | 33°C |
| March | 30°C | 32°C | 33°C |
| April | 28°C | 31°C | 33°C |
| May | 26°C | 31°C | 33°C |
| June | 25°C | 30°C | 33°C |
| July | 26°C | 30°C | 33°C |
| August | 27°C | 31°C | 33°C |
| September | 28°C | 32°C | 33°C |
| October | 31°C | 32°C | 33°C |
| November | 30°C | 32°C | 33°C |
| December | 30°C | 32°C | 33°C |
Location & Local Information
Mataranka sits along the upper reaches of the Roper River, in a part of the Top End where groundwater plays a big role in river conditions. Water temperature here is influenced not just by the tropical climate, but also by warm spring-fed inflows. In the hotter months, from December to March, river temperatures around Mataranka are usually in the range of about 26–30°C, staying fairly consistent even during heatwaves. During the Dry Season, roughly May to September, the water remains pleasantly warm, generally around 24–28°C. Unlike many rivers, winter doesn’t bring a big chill here, and the water rarely feels cold at any time of year.
Swimming Conditions
Swimming around Mataranka is allowed and is one of the main reasons people stop in the area. The steady, warm water makes swimming comfortable year-round, not just for a quick dip but for a proper soak. Calm sections and nearby spring-fed areas are especially popular, as they offer clear water and gentle flow. Even so, this is still part of the Roper River system, so awareness is important. Crocodiles are present further downstream, and conditions can change after heavy rain. Swimming is best done in well-known, established spots where conditions are understood and monitored.